Sho's website

Publication List

Publication Index

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2018

2017

2016

2015

2014

2013

2012

2011

2009

Articles in Proceedings

Articles in Reports

Theses

Undergrad work (2008; in japanese): Linear Collider –to-> Relic Density

The work I did in the “Undergraduate Research” course; this work was supervised by Dr. Masako Iwasaki, a lecturer of Aihara Lab. (lab on experimental particle physics).

We followed the work by Feng and Peskin and showed how precisely we can measure the mass of the superpaticles with the International Linear Collider.

Author
Sho Iwamoto.
PDF
https://www.misho-web.com/phys/papers/bachelor_thesis_080212.pdf

Talk
30 Mar. 2008 as a talk for public in Generation-86 Graduation Work Exhibition [slides]

Magisterial thesis (2010): Supersymmetry without R-Parity: Its Phenomenology

Author
Sho Iwamoto.
PDF
https://www.misho-web.com/phys/papers/master_thesis.pdf

Talk
1 Feb. 2010 in Defense for Master's Degree [slides]

Dissertation (2013): Supersymmetry after the Higgs discovery and its LHC phenomenology

Lepton Flavor Violation and Cosmological Constraints on R-parity Violation

Authors
Motoi Endo, Koichi Hamaguchi, and Sho Iwamoto.
Journal
JCAP 1002 (2010) 032 [arXiv:0912.0585] PDF

Talk
4 Dec. 2009 in JSPS Fellowship Screening Interview [slides]
Talk
1 Feb. 2010 in Defense for Master's Degree [slides]
Talk
20 Feb. 2010 in KEK-PH 2010 [slides]
Talk
4 Oct. 2010 in 2nd Bethe Center Workshop [slides]

Stau Kinks at the LHC

Authors
Shoji Asai, Yuya Azuma, Motoi Endo, Koichi Hamaguchi, and Sho Iwamoto.
Journal
JHEP 1112 (2011) 041 [arXiv:1103.1881] PDF

Talk
20 Aug. 2011 in YONUPA Summer School 2011 [slides]
Poster
7‒8 Sep. 2011 in IPMU–YITP School on Monte Carlo Tools for LHC [poster file]
Talk
16 Jan. 2012 as a seminar talk at University of Bonn [slides]
Talk
30 Jan. 2012 as a seminar talk at DESY [slides]
Talk
27 Feb. 2012 in KEK-PH 2012 [slides]

Higgs Mass and Muon Anomalous Magnetic Moment in Supersymmetric Models with Vector-Like Matters

In 2012 summer, we had some 2σ indication of 130‒140 GeV Higgs boson. It was extremely heavier than expected, and if we assume the MSSM framework, such mass cannot be achieved without very very fine tuning, which was of a great depression. This depression stands out with taking the muon anomaly into consideration, which requires a much lighter SUSY scale.

So \n\n\nwe extend the MSSM with , or extra vector-like quarks. Such extra matters yields coupling, which drastically lifts up the Higgs mass with the same mechanism as , and with the help we can keep the SUSY scale lighter to achieve the SUSY explanation of the muon anomaly.

The 130-140 GeV Higgs signal disappeared soon as is usual for 2σ excesses, but this framework was used in the next paper.

Authors
Motoi Endo, Koichi Hamaguchi, Sho Iwamoto, and Norimi Yokozaki.
Journal
Phys. Rev. D 84 (2011) 075017 [arXiv:1108.3071] PDF

Related work
[1112.5653] a follow-up paper on LHC phenomenology [arXiv] PDF
Related work
[1202.2751] a follow-up paper on vacuum stability [arXiv] PDF
Related work
[1212.3935] a follow-up paper on further LHC phenomenology [arXiv] PDF
Related work
[1112.6412] a similar work with extra U(1) gauge symmetry [arXiv] PDF

Talk
18 Feb. 2012 in Physics opportunities with LHC at 7 TeV [slides]
Talk
20 Feb. 2012 in Winter Toyama 2012, phenomenology & cosmology workshop [slides]
Talk
9 Mar. 2012 in Sapporo Winter School 2012 [slides]
Talk
15 Mar. 2012 in GUT2012 [slides]
Talk
19 Apr. 2012 as a seminar talk at Niigata U. and U. Toyama [slides]
Talk
6 Aug. 2012 in YONUPA Summer School 2012 [slides]
Talk
8 Feb. 2013 as a seminar talk at Kyushu University [slides]
Talk
1 May 2013 as a seminar talk at Kavli IPMU, U. Tokyo [slides]

LHC Dijet Signals in New Physics Models for Top Forward–Backward Asymmetry

Authors
Motoi Endo and Sho Iwamoto.
Preprint
arXiv:1110.0014 PDF

Poster
13 Aug. 2011 in SI2011 (phenomenology)

Higgs mass, muon g−2, and LHC prospects in gauge mediation models with vector-like matters

Authors
Motoi Endo, Koichi Hamaguchi, Sho Iwamoto, and Norimi Yokozaki.
Journal
Phys. Rev. D 85 (2012) 095012 [arXiv:1112.5653] PDF

Related work
[1108.3071] the seminal work in which this scenario is introduced [arXiv] PDF
Related work
[1212.3935] a follow-up paper on further LHC phenomenology [arXiv] PDF

Talk
18 Feb. 2012 in Physics opportunities with LHC at 7 TeV [slides]
Talk
20 Feb. 2012 in Winter Toyama 2012, phenomenology & cosmology workshop [slides]
Talk
9 Mar. 2012 in Sapporo Winter School 2012 [slides]
Talk
15 Mar. 2012 in GUT2012 [slides]
Talk
19 Apr. 2012 as a seminar talk at Niigata U. and U. Toyama [slides]
Talk
6 Aug. 2012 in YONUPA Summer School 2012 [slides]
Talk
8 Feb. 2013 as a seminar talk at Kyushu University [slides]
Talk
1 May 2013 as a seminar talk at Kavli IPMU, U. Tokyo [slides]

Higgs mass and muon anomalous magnetic moment in the U(1) extended MSSM

This work is, similar to the previous work, a study on a model which can realize the simultaneous explanation of the Higgs mass and the muon anomaly. In this paper we extend the MSSM with an extra U(1) gauge symmetry. We first see that the simultaneous realization is certainly achieved, and then LHC phenomenology is discussed.

Authors
Motoi Endo, Koichi Hamaguchi, Kazunori Nakayama, Sho Iwamoto, and Norimi Yokozaki.
Journal
Phys. Rev. D 85 (2012) 095006 [arXiv:1112.6412] PDF

Related work
[1108.3071] a similar work with extra vector-like quarks [arXiv] PDF

Talk
19 Apr. 2012 as a seminar talk at Niigata U. and U. Toyama [slides]
Talk
8 Feb. 2013 as a seminar talk at Kyushu University [slides]
Talk
1 May 2013 as a seminar talk at Kavli IPMU, U. Tokyo [slides]

Vacuum Stability Bound on Extended GMSB Models

Authors
Motoi Endo, Koichi Hamaguchi, Sho Iwamoto, and Norimi Yokozaki.
Journal
JHEP 1206 (2012) 060 [arXiv:1202.2751] PDF

Related work
[1108.3071] the seminal work in which this scenario is introduced [arXiv] PDF

Talk
18 Feb. 2012 in Physics opportunities with LHC at 7 TeV [slides]
Talk
20 Feb. 2012 in Winter Toyama 2012, phenomenology & cosmology workshop [slides]
Talk
9 Mar. 2012 in Sapporo Winter School 2012 [slides]
Talk
15 Mar. 2012 in GUT2012 [slides]
Talk
19 Apr. 2012 as a seminar talk at Niigata U. and U. Toyama [slides]
Talk
6 Aug. 2012 in YONUPA Summer School 2012 [slides]
Talk
8 Feb. 2013 as a seminar talk at Kyushu University [slides]
Talk
1 May 2013 as a seminar talk at Kavli IPMU, U. Tokyo [slides]

Muon g−2 anomaly and 125 GeV Higgs : Extra vector-like quark and LHC prospects (in proceedings)

Comment on the CMS search for charge-asymmetric production of W′ boson in ttbar + jet events

This article contains comments on a recent paper(1206.3921) by the CMS collaboration, where an inclusive search for new physics in events. This search targets an extra boson which couples to the top and down quarks, which motivated by the Tevatron top forward-backward asymmetry. We first tried to interpret their results on plane, but our calculated cross section does not match theirs, and we consider this possibility. This is a very short paper with 7 pages; especially the text is just for 3 pages. We wrote up this article in 3 days. Actually the PC spent more time on the calculation than I spent on the writing…

Authors
Motoi Endo and Sho Iwamoto.
Journal
Phys. Lett. B 718 (2013) 1070‒1072 [arXiv:1207.5900] PDF

Gauge Mediation Models with Vectorlike Matters at the LHC

Authors
Motoi Endo, Koichi Hamaguchi, Kazuya Ishikawa, Sho Iwamoto, and Norimi Yokozaki.
Journal
JHEP 1301 (2013) 181 [arXiv:1212.3935] PDF

Related work
[1108.3071] the seminal work in which this scenario is introduced [arXiv] PDF
Related work
[1112.5653] a previous work on LHC phenomenology of this scenario [arXiv] PDF

Talk
18‒19 Oct. 2016 as an invited talk in Search for New Physics through the Higgs Boson [slides]

Muon g−2 vs LHC in Supersymmetric Models

Authors
Motoi Endo, Koichi Hamaguchi, Sho Iwamoto, and Takahiro Yoshinaga.
Journal
JHEP 1401 (2014) 123 [arXiv:1303.4256] PDF

Related work
[1704.05287] a similar work but with other types of SUSY models [arXiv] PDF

Talk
13 Feb. 2013 in HPNP 2013 [slides]
Talk
1 May 2013 as a seminar talk at Kavli IPMU, U. Tokyo [slides]
Talk
27 Aug. 2013 in SUSY 2013 [slides]
Talk
7 Dec. 2013 in ATLAS-Japan workshop [slides]
Talk
17 Dec. 2014 as a seminar talk at Joint particle physics meeting (Tel Aviv U.) [slides]
Talk
2 Sep. 2015 as a seminar talk at University of California·Irvine [slides]
Talk
18‒19 Oct. 2016 as an invited talk in Search for New Physics through the Higgs Boson [slides]
Talk
30 Apr. 2018 as a seminar talk at Korea University [slides]
Talk
1 May 2018 as a seminar talk at KIAS [slides]
Talk
4 May 2018 in KAIST–KU–PNU Joint Workshop [slides]
Talk
22 Aug. 2018 in Beyond Standard Model: Where do we go from here? [slides]

Recent Result of the AMS-02 Experiment and Decaying Gravitino Dark Matter in Gauge Mediation

Authors
Masahiro Ibe, Sho Iwamoto, Shigeki Matsumoto, Takeo Moroi, and Norimi Yokozaki.
Journal
JHEP 1308 (2013) 029 [arXiv:1304.1483] PDF

Talk
20 Nov. 2013 in PASCOS 2013 [slides]

LHC SUSY searches after the Higgs discovery: respecting the muon g−2 (in proceedings)

Author
Sho Iwamoto.
Journal
SLAC eConf C130213.1 (2013) 15‒21 [arXiv:1304.5171] PDF

Original work
1303.4256

Reconstructing Supersymmetric Contribution to Muon Anomalous Magnetic Dipole Moment at ILC

Authors
Motoi Endo, Koichi Hamaguchi, Sho Iwamoto, Teppei Kitahara, and Takeo Moroi.
Journal
Phys. Lett. B 728 (2014) 274‒281 [arXiv:1310.4496] PDF

Talk
13 Feb. 2014 in BURI 2014 [slides]
Talk
21 Jul. 2014 in ILC Summer Camp 2014 [slides]
Talk
22 Jul. 2014 in ILC Summer Camp 2014 [slides]

CP-safe Gravity Mediation and Muon g−2

SUSY is a good candidate to solve the discrepancy of muon between the experimental result and theoretical expectations. To this end, non-colored SUSY particles should be as light as O(100) GeV, while the Higgs boson mass suggests colored SUSY particles should be heavier than 1 TeV. This separation can be explained by non-universal gaugino mass, which though involves the risk of CP-violation because of phase misalignments among the gaugino masses. To solve this problem, we built a model which has no CP-violation to realize the non-universal gaugino mass.

This work was in collaboration with Tsutomu and Norimi; we were heading back from the cafeteria and talking the model to solve the anomaly; I was interested in gaugino mediation and told Tsutomu it was good, but he realized that CP-violation which the model involves is critically bad. Then we stop thinking, but a day Tsutomu suddenly came with a model. Norimi and I analyzed the model, and confirmed that the model fits to my purpose to solve the anomaly.

Authors
Sho Iwamoto, Tsutomu T. Yanagida, and Norimi Yokozaki.
Journal
PTEP 2015 073B01 [arXiv:1407.4226] PDF

Talk
30 Jul. 2014 in Progress of Particle Physics 2014 [slides]
Talk
25 Aug. 2014 in SI2014 [slides]
Talk
17 Dec. 2014 as a seminar talk at Joint particle physics meeting (Tel Aviv U.) [slides]

Long-lived sleptons at the LHC and a 100 TeV proton collider

This work shows how far we can search for long-lived charged particles in future colliders. To answer this question is, actually, not very interesting; just do Monte Carlo simulation, and that’s all. However, in this work, we realized two features at the future collider as important; one is the radiative energy loss of muons, which can only be seen in such high energy, and the other is the fact that we should carefully treat the momentum resolution in such high energy.

This work was originated in May 2014; I thought I could finish before long, but as our Monte Carlo simulation as well as statistical treatment was done very seriously, and the manuscript writing was with much argument, it finally took one year. (and also, as actually the biggest reason, because I moved from Japan to Israel in this period.)

Authors
Jonathan L. Feng, Sho Iwamoto, Yael Shadmi, and Shlomit Tarem.
Journal
JHEP 1512 (2015) 166 [arXiv:1505.02996] PDF

Talk
24 Aug. 2015 in SUSY 2015 [slides]
Talk
13 Dec. 2015 in Israel Physical Society 61st annual meeting [slides]
Talk
18‒19 Oct. 2016 as an invited talk in Search for New Physics through the Higgs Boson [slides]
Talk
18 Jan. 2017 in 1st FCC Physics Workshop [slides]
Talk
27 Aug. 2017 in SI2017 [slides]
Talk
18 Sep. 2017 as a seminar talk at National Taiwan University [slides]
Talk
2 Nov. 2017 as a seminar talk at Tohoku University [slides]

LHC benchmarks from flavored gauge mediation

Authors
Niv Ierushalmi, Sho Iwamoto, Gabriel Lee, Vera Nepomnyashy, and Yael Shadmi.
Journal
JHEP 1607 (2016) 058 [arXiv:1603.02637] PDF

Talk
24 Aug. 2016 in Effective Field Theories as Discovery Tools [slides]

Diphoton signals from colorless hidden quarkonia

Authors
Sho Iwamoto, Gabriel Lee, Yael Shadmi, and Robert Ziegler.
Journal
Phys. Rev. D 94 (2016) 015003 [arXiv:1604.07776] PDF

Physics at a 100 TeV pp collider: beyond the Standard Model phenomena (in report)

Editors
T. Golling, M. Hance, P. Harris, M. L. Mangano, et al.
Journal
Chapter 3 of the “Physics at the FCC-hh” Report [arXiv:1606.00947] PDF

Original work
1505.02996

Heavy bino dark matter and collider signals in the MSSM with vectorlike fourth-generation particles

Authors
Mohammad Abdullah, Jonathan L. Feng, Sho Iwamoto, and Benjamin Lillard.
Journal
Phys. Rev. D 94 (2016) 095018 [arXiv:1608.00283] PDF

Talk
15 Sep. 2016 as a seminar talk at Osaka University [slides]
Talk
20 Sep. 2016 as a seminar talk at The University of Tokyo [slides]
Talk
18‒19 Oct. 2016 as an invited talk in Search for New Physics through the Higgs Boson [slides]
Talk
7 Nov. 2016 as a seminar talk at DAMTP, U. Cambridge [slides]
Talk
10 Nov. 2016 as a seminar talk at IPPP, Durham U. [slides]
Talk
25 Dec. 2016 in Israel Physical Society 62nd annual meeting [slides]
Talk
31 Jan. 2018 as a seminar talk at Internal meeting of ATLAS SUSY WG (CERN) [slides]

Tagging new physics with charm

Authors
Sho Iwamoto, Gabriel Lee, Yael Shadmi, and Yaniv Weiss.
Journal
JHEP 1709 (2017) 114 [arXiv:1703.05748] PDF

Talk
3 May 2017 as a seminar talk at Joint particle physics meeting (Weizmann Institute) [slides]
Talk
25 Oct. 2017 as an invited talk in Workshop on Beyond Standard Model and the Early Universe [slides]

Probing minimal SUSY scenarios in the light of muon g−2 and dark matter

Authors
Motoi Endo, Koichi Hamaguchi, Sho Iwamoto, and Keisuke Yanagi.
Journal
JHEP 1706 (2017) 031 [arXiv:1704.05287] PDF

Related work
[1303.4256] a seminal work on LHC phenomenology of “muon g-2 SUSY” [arXiv] PDF

Dark quarkonium formation in the early universe

Authors
Michael Geller, Sho Iwamoto, Gabriel Lee, Yael Shadmi, and Ofri Telem.
Journal
JHEP 1806 (2018) 135 [arXiv:1802.07720] PDF